authoized_keys: removed my public ssh key from authorized keys
start: added an interactive timeout of 120 seconds for mysqld server to start.
start: use the mysql password if specified in the mysql server status check.
install: do not delete contents of /var/lib/mysql/

We now use mysql commands to check of the database exists.
start: use the DB_ env variables in the MYSQL CREATE and GRANT commands.
start: check DB exists, create db and grant permissions in the same code block
README: added installation references.
README: fix Quickstart docker command.
README: fix references.
README: added git clone command to installation section
Merge upstream changes